龋齿是最多发的口腔科疾病,幼儿及学龄儿童的患病率较高,一般是城市比农村多。但山区小城镇的患病率如何,少见报导。为了摸清其患病情况,我们对地处云贵高原南麓的凌云县城厢小学7～12岁学生进行了调查。 Dental caries is the most common dental disease, and the prevalence of young children and school-age children is high, generally more in cities than in rural areas. However, the prevalence of small towns in mountainous areas is rarely reported. In order to find out its prevalence, we conducted a survey of students aged 7 to 12 in Chengxiang Elementary School located in the south of Yunnan-Guizhou Plateau.